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348 Cota Barrel

79cota348
in Montesa

Featured Replies

Hi,

I'm in mid restoration of my 79 Cota 348.

Can anyone explain the 2 machined groves in the top mating face of the cylinder?

Do I need a gasket, O-rings or something similar on assembly?

I would appreciate any info.

Photo attached.

 

post-21805-0-48328900-1450123842_thumb.jpg

  • Quote

    The grooves are to improve the sealing of the head-cylinder joint. No O rings or gasket or sealant are needed. You could fit a copper or aluminium gasket if you want to reduce the compression ratio, but it is not needed for sealing.

    Having the grooves reduces the force required to create a seal.

  • Quote
    • Like 1
    • Author

    Hi 'feetupfun' appreciate the info. 

    Hope to have the Mont back in action by spring time. 

  • Quote
    • Like 1

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